US5405163A - Energy absorbing air bag container - Google Patents

Energy absorbing air bag container Download PDF

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Publication number
US5405163A
US5405163A US08128141 US12814193A US5405163A US 5405163 A US5405163 A US 5405163A US 08128141 US08128141 US 08128141 US 12814193 A US12814193 A US 12814193A US 5405163 A US5405163 A US 5405163A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
container
side portions
lid
portions
air bag
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08128141
Inventor
Ichiro Amamori
Akira Kokeguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takata Corp
Original Assignee
Takata Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/217Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
    • B60R21/2171Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together specially adapted for elongated cylindrical or bottle-like inflators with a symmetry axis perpendicular to the main direction of bag deployment, e.g. extruded reaction canisters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R21/30Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow with means to draw ambient air into the flow line and mix such air with the inflation fluid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/04Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings
    • B60R21/045Padded linings for the vehicle interior ; Energy absorbing structures associated with padded or non-padded linings associated with the instrument panel or dashboard

Abstract

An air bag device for a vehicular passenger is formed of a box-shaped container having an open front face; an air bag confined in a folded shape in the container; an inflator attached to the container; and a lid covering the front face of the container. Further, a stress concentration portion is formed in the container for starting the buckling deformation of the container when an impact is applied to the container from the front.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an air bag device which is mounted in the instrument panel of a vehicle for extending an air bag to protect a passenger at the time of a collision of the vehicle.

2. Description of the Related Art

In the air bag device for a vehicular passenger, a folded air bag and an inflator are confined in a box-shaped container, and a lid is so attached to the container as to cover the air bag. When the vehicle collides, the inflator operates to extend the air bag largely into the cabin thereby to protect the passenger.

The instrument panel is regulated by the Law (i.e., the regulations of the instrument panel against an impact) to have characteristics, in which it is deformed or recessed, when impacted, so as to absorb the impact coming from the hit of a passenger. The air bag device for a vehicular passenger also has to clear these instrument panel impact regulations.

The container of the air bag device for a vehicular passenger has to be deformed to satisfy the instrument panel impact regulations. Against an impact lower than a predetermined value, the lid or container is required to have a sufficient strength and an excellent durability. Thus, the air bag device is improper if the lid or container is made so fragile as to clear merely the instrument panel impact regulations.

OBJECT AND SUMMARY OF THE INVENTION

The present invention has an object to provide an air bag device for a vehicular passenger, which has a container having a sufficient strength and capable of absorbing an impact applied to the instrument panel sufficiently.

According to the present invention, there is provided an air bag device for a vehicular passenger, which comprises: a box-shaped container having an open front face; an air bag confined in a folded shape in said container; an inflator attached to said container; and a lid covering the front face of said container, wherein the improvement comprises a stress concentration portion for starting the buckling deformation of said container when an impact is applied to said container from the front.

In the air bag device for a vehicular passenger according to the present invention, if a strong impact is applied to the container from the front, the resultant stress is concentrated in the stress concentration portion to start the buckling deformation from that portion. Thus, the impact is absorbed by the buckling deformation of the container.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing an air bag device for a vehicular passenger according to an embodiment of the present invention;

FIG. 2 is a section view taken along a line 2--2 of FIG. 1;

FIG. 3 is an exploded perspective view showing the device of the embodiment;

FIG. 4 is a bottom view showing a container 52A according to another embodiment; and

FIG. 5 is a side elevation showing a container 52B according to still another embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will be described in the following in connection with its embodiments with reference to the accompanying drawings.

FIGS. 1 to 3 show an air bag device according to an embodiment, wherein FIG. 1 is a perspective view showing an overall structure; FIG. 2 is a section view taken along a line 2--2 of FIG. 1; and FIG. 3 is an exploded perspective view.

In this air bag device, as generally designated at 50, a lid 54 is attached to the open front face of a box-shaped container 52. An inflator 56 is fixed in the container 52. An air bag 58 is fitted in a folded shape in the container 52, to which the lid 54 is fixed by means of bolts 59.

The container 52 is formed individually in its upper, side and lower faces with a number of aspiration holes 60. When the inflator 56 operates to inject its gases into the container 52 to inflate the air bag 58, the air flows into the container 52 through those aspiration holes 60 to extend the air bag 58 quickly.

This container 52 is formed in its side faces 52S with stress concentration portions 61 in a straight shape. These stress concentration portions 61 are formed by pressing the side faces 52S to form grooves 61a and ridges 61b, as shown in FIG. 2. The grooves 61a are formed in the inner face of the container 52 but may be formed in the outer face. However, the grooves 61a may preferably be formed in the container inner face, as shown, so as to reduce the possible friction with the air bag.

The stress concentration portions 61 may preferably extend parallel to or at a small angle with respect to the front edge of the container 52. This small angle of intersection between the stress concentration portions 61 and the front edge of the container 52 may preferably be within 45 degrees.

The lid 54 is composed of a backup plate 62 made of an aluminum alloy and a soft cover 64 covering the front face of the plate 62. This plate 62 has its upper edge extended upward of the container 52 to provide a lid mount 66.

To the upper face of the container 52, there is spot-welded a lid mounting bracket 68. This lid mounting bracket 68 is extended along the upper face of the container 52 and is formed with a number of bolt holes 70. The lid mount 66 is also formed with a number of corresponding bolt holes 72. Thus, the lid mount 66 is fixed on the lid mounting bracket 68 by means of bolts 74 and nuts.

As shown in FIGS. 1 and 3, the container 52 has its back face composed of first and second back plates 78a and 78b. These back plates 78a and 78b are recessed to receive the inflator 56. Moreover, the first back plate 78a is slitted at 76 for introducing the injected gases of the inflator 56 into the container 52.

The first and second back plates 78a and 78b are fixed to the flaps 52a and 52b of the container 52 by means of bolts 80. These bolts 80 are anchored at the first back plate 78a and extend through the bolt holes of the flaps 52a and 52b and the second back plate 78b.

The container 52 thus constructed is formed generally into a shape of letter "U" by punching a metal sheet and bending its bottom face, two side faces 52S and flap 52a. The upper face of the container 52 is formed integrally with the flap 52b by punching and subsequently folding a metal sheet. This upper face has its side ears 84 and 86 spot-welded to the side faces 52S.

The side faces 52S of the container 52 are formed at their rear edges with L-shaped hooks 88. These hooks 88 have their front ends 88a inserted into slits which are formed in the side faces of the first back plate 78a, so that the hooks 88 are retained in the back plate 78a.

Numeral 92 designates connecting members connecting the lower ends of the lid 54 and the container 52. These connecting members 92 are broken, when the lid 54 is opened, to allow the lower end of the lid 54 to turn up.

In the air bag device for a vehicular passenger thus constructed, when an impact is applied from the front of the container 52, the resultant stress is concentrated at the stress concentration portions 61 of the container 52 so that the portions 61 are deformed to bulge sideways of the container 52. As a result, the overall deformation (i.e., a crushed deformation) of the container 52 quickly progresses to absorb the applied impact sufficiently.

If, however, the applied impact is weak, the container 52 does not undergo any deformation to improve the durability of the air bag device.

In the embodiment described above, the container side faces 52S are formed with the stress concentration portions 61. However, these portions 61 may be formed either in the upper or bottom face of the container 52 of FIG. 1 or in the lid mounting bracket 68.

These modifications are shown in FIGS. 4 and 5. FIG. 4 is a bottom view showing a container 52A which is formed in its lower face with a stress concentration portion 94 in a straight shape. This stress concentration portion 94 extends parallel to the front edge of the container 52A. On the other hand, FIG. 5 is a side elevation showing a container 52B which is formed with aspiration holes 60' and a stress concentration portion 96 in a straight shape in a side face of a lid mounting bracket 68A.

In the above described embodiments, the container 52 is formed with a number of aspiration holes 60. As a result, if the container 52 starts its buckling from the stress concentration portion or portions 61, the container 52 is easily crushed as a whole so that it can absorb much impact energy in its entirety.

As described above, in the air bag device for a vehicular passenger according to the present invention, when an impact stronger than a predetermined level is applied to the container from the inside of the cabin, the container can be quickly deformed to absorb the impact efficiently. If the impact applied is weaker than the predetermined level, on the other hand, the container does not undergo any deformation to impart a sufficiently high durability to the air bag device.

Claims (3)

What is claimed is:
1. An air bag device for a passenger, comprising:
a rectangular container having an open front face, two side portions, and upper and lower portions, said side portions and upper and lower portions surrounding the open front face,
an air bag confined in a folded shape in said container,
an inflator attached to said container,
a lid attached to said container for covering the open front face,
a plurality of aspiration holes formed in at least said side portions of the container for allowing air to enter into said container therethrough when said air bag is deployed upon actuation of the inflator, and
stress concentration portions formed in the side portions, each stress concentration portion being formed of a curved ridge protruding outwardly from each side portion of the container and a groove located at a back of the curved ridge and facing an inside of the container to prevent friction between the curved ridge and the air bag, each stress concentration portion extending linearly across the aspiration holes and being disposed near the lid to incline upwardly with an angle less than 45 degrees relative to the lid so that each stress concentration portion starts from a portion near the lid at a predetermined distance away from the lower portion of the container and an edge of the open front face to a portion near and at a predetermined distance away from the upper portion of the container, so that when an upper portion of the lid is pressed only more than a predetermined pressure, the side portions of the container bend along the stress concentration portions to expand laterally outwardly of the container to thereby absorb pressure applied to the lid.
2. An air bag device for a passenger according to claim 1, further comprising a lid mounting bracket having side portions and an upper portion between the side portions, said side portions of the lid mounting bracket being fixed to the side portions of the container and having a plurality of aspiration holes and second stress concentration portions extending across the aspiration holes in the side portions of the lid mounting bracket parallel to the upper portion of the container to absorb pressure applied thereto.
3. An air bag device for a passenger, comprising:
a rectangular container having an open front face, two side portions, and upper and lower portions, said side portions and upper and lower portions surrounding the open front face,
an air bag confined in a folded shape in said container,
an inflator attached to said container,
a lid attached to said container for covering the open front face,
a plurality of aspiration holes formed in at least said side portions of the container for allowing air to enter into said container therethrough when said air bag is deployed upon actuation of the inflator,
stress concentration portions formed in the side portions, each stress concentration portion being formed of a curved ridge and a groove at a back of the ridge so that the curved ridge protrudes outwardly from the respective side portion of the container and the groove is located inside the container to reduce friction with the air bag, said stress concentration portions extending linearly across the aspiration holes and being disposed near the lid substantially parallel thereto so that when the lid is pressed more than a predetermined pressure, the side portions of the container bend along the stress concentration portions to expand outwardly to thereby absorb pressure applied to the lid, and
a lid mounting bracket having side portions and an upper portion between the side portions thereof, said side portions of the lid mounting bracket being fixed to the side portions of the container and having a plurality of aspiration holes and second stress concentration portions extending across the aspiration holes in the side portions of the lid mounting bracket parallel to the upper portion of the container to absorb pressure applied thereto.
US08128141 1992-10-16 1993-09-29 Energy absorbing air bag container Expired - Lifetime US5405163A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP4-278488 1992-10-16
JP27848892A JP3161086B2 (en) 1992-10-16 1992-10-16 Air bag device for a passenger's seat
US08280657 US5431439A (en) 1992-10-16 1994-07-27 Air bag device for passenger

Publications (1)

Publication Number Publication Date
US5405163A true US5405163A (en) 1995-04-11

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
US08128141 Expired - Lifetime US5405163A (en) 1992-10-16 1993-09-29 Energy absorbing air bag container
US08280657 Expired - Lifetime US5431439A (en) 1992-10-16 1994-07-27 Air bag device for passenger

Family Applications After (1)

Application Number Title Priority Date Filing Date
US08280657 Expired - Lifetime US5431439A (en) 1992-10-16 1994-07-27 Air bag device for passenger

Country Status (4)

Country Link
US (2) US5405163A (en)
JP (1) JP3161086B2 (en)
DE (1) DE4335073B4 (en)
GB (1) GB2271532B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5588675A (en) * 1993-12-20 1996-12-31 General Motors Corporation Air bag module with gas augmentation
US5791684A (en) * 1996-08-01 1998-08-11 Morton International, Inc. Airbag reaction canister with collapsible side wall
US6296277B1 (en) * 1998-05-18 2001-10-02 Chrysler Corporation Integral passenger restraint system
US20030111827A1 (en) * 2001-12-14 2003-06-19 Erhard Schaufele Airbag housing
EP1285822A3 (en) * 2001-08-11 2003-09-17 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Airbag device for a motor vehicle
WO2005039937A2 (en) * 2003-10-22 2005-05-06 Autoliv Development Ab Housing for receiving a motor vehicle airbag module
US20060022435A1 (en) * 2004-07-30 2006-02-02 Takata Corporation Airbag unit and case of airbag unit
US20060043700A1 (en) * 2004-08-25 2006-03-02 Takata Corporation Airbag unit and case of airbag unit
US20060091651A1 (en) * 2004-10-27 2006-05-04 Nihon Plast Co., Ltd. Air bag module
US20070235987A1 (en) * 2006-04-11 2007-10-11 Brian Boggess Impact Absorbing Airbag Inflator

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
DE4437773C1 (en) * 1994-10-24 1995-10-26 Daimler Benz Ag Instrument panel with an integrated airbag hinged lid
DE19612227A1 (en) * 1996-03-27 1997-10-02 Bayerische Motoren Werke Ag Arrangement of an inflatable head protection system in a motor vehicle
DE19612228A1 (en) 1996-03-27 1997-10-02 Bayerische Motoren Werke Ag Inflatable head protection system for the range of a passenger car
DE19851975A1 (en) * 1998-11-11 2000-05-18 Daimler Chrysler Ag Airbag module housing

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GB1358364A (en) * 1971-12-03 1974-07-03 Daimler Benz Ag Vehicle with automatically inflatable protective gas cushion
US3938826A (en) * 1974-02-07 1976-02-17 Eaton Corporation Aspirated vehicle occupant restraint system
JPH02155855A (en) * 1988-12-07 1990-06-14 Toyota Motor Corp Air bag case
US4949990A (en) * 1987-12-18 1990-08-21 Honda Giken Kogyo Kabushiki Kaisha Steering column fixing structure for a vehicle
JPH02306846A (en) * 1989-05-23 1990-12-20 Honda Motor Co Ltd Automobile air bag device
US5100172A (en) * 1991-04-12 1992-03-31 Automotive Systems Laboratory, Inc. Inflator module
JPH04166458A (en) * 1990-10-30 1992-06-12 Toyoda Gosei Co Ltd Steering wheel provided with air bag apparatus
US5190314A (en) * 1990-07-04 1993-03-02 Mazda Motor Corporation Glove box structure of vehicle
US5209519A (en) * 1990-06-18 1993-05-11 Honda Giken Kogyo Kabushiki Kaisha Vehicle occupant protection air bag module
GB2262071A (en) * 1991-12-04 1993-06-09 Takata Corp An air bag device for a passenger
GB2265337A (en) * 1992-03-25 1993-09-29 Takata Corp Lid for a vehicle air bag device
US5342082A (en) * 1993-05-28 1994-08-30 Morton International, Inc. Airbag reaction canister having softened edges

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US5069480A (en) * 1989-05-31 1991-12-03 Allied-Signal Inc. Air bag retainer assembly
US5129674A (en) * 1990-11-27 1992-07-14 Trw Vehicle Safety Systems Inc. Reaction device for air bag module
US5145207A (en) * 1991-07-15 1992-09-08 Chrysler Corporation Mounting means for a vehicle passenger side air bag structure
US5306042A (en) * 1992-07-06 1994-04-26 General Motors Corporation Air bag depolyment control

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Publication number Priority date Publication date Assignee Title
GB1303567A (en) * 1970-07-09 1973-01-17
GB1358364A (en) * 1971-12-03 1974-07-03 Daimler Benz Ag Vehicle with automatically inflatable protective gas cushion
US3938826A (en) * 1974-02-07 1976-02-17 Eaton Corporation Aspirated vehicle occupant restraint system
GB1479104A (en) * 1974-02-07 1977-07-06 Eaton Corp Aspirated vehicle occupant restraint system
US4949990A (en) * 1987-12-18 1990-08-21 Honda Giken Kogyo Kabushiki Kaisha Steering column fixing structure for a vehicle
JPH02155855A (en) * 1988-12-07 1990-06-14 Toyota Motor Corp Air bag case
JPH02306846A (en) * 1989-05-23 1990-12-20 Honda Motor Co Ltd Automobile air bag device
US5209519A (en) * 1990-06-18 1993-05-11 Honda Giken Kogyo Kabushiki Kaisha Vehicle occupant protection air bag module
US5190314A (en) * 1990-07-04 1993-03-02 Mazda Motor Corporation Glove box structure of vehicle
JPH04166458A (en) * 1990-10-30 1992-06-12 Toyoda Gosei Co Ltd Steering wheel provided with air bag apparatus
US5100172A (en) * 1991-04-12 1992-03-31 Automotive Systems Laboratory, Inc. Inflator module
GB2262071A (en) * 1991-12-04 1993-06-09 Takata Corp An air bag device for a passenger
GB2265337A (en) * 1992-03-25 1993-09-29 Takata Corp Lid for a vehicle air bag device
US5342082A (en) * 1993-05-28 1994-08-30 Morton International, Inc. Airbag reaction canister having softened edges

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5588675A (en) * 1993-12-20 1996-12-31 General Motors Corporation Air bag module with gas augmentation
US5791684A (en) * 1996-08-01 1998-08-11 Morton International, Inc. Airbag reaction canister with collapsible side wall
US6296277B1 (en) * 1998-05-18 2001-10-02 Chrysler Corporation Integral passenger restraint system
EP1285822A3 (en) * 2001-08-11 2003-09-17 Dr.Ing. h.c.F. Porsche Aktiengesellschaft Airbag device for a motor vehicle
US6854761B2 (en) 2001-08-11 2005-02-15 Dr. Ing. H.C.F. Porsche Ag Airbag system for a motor vehicle
US20030111827A1 (en) * 2001-12-14 2003-06-19 Erhard Schaufele Airbag housing
US6799775B2 (en) * 2001-12-14 2004-10-05 Daimlerchrysler Ag Airbag housing
WO2005039937A2 (en) * 2003-10-22 2005-05-06 Autoliv Development Ab Housing for receiving a motor vehicle airbag module
WO2005039937A3 (en) * 2003-10-22 2005-06-16 Autoliv Dev Housing for receiving a motor vehicle airbag module
US20070290491A1 (en) * 2003-10-22 2007-12-20 Sven Hoffmann Housing for Receiving a Motor Vehicle Airbag Module
US7614644B2 (en) 2003-10-22 2009-11-10 Autoliv Development Ab Housing for receiving a motor vehicle airbag module
US20060022435A1 (en) * 2004-07-30 2006-02-02 Takata Corporation Airbag unit and case of airbag unit
US7377539B2 (en) 2004-07-30 2008-05-27 Takata Corporation Airbag unit and case of airbag unit
US20060043700A1 (en) * 2004-08-25 2006-03-02 Takata Corporation Airbag unit and case of airbag unit
US7377540B2 (en) 2004-08-25 2008-05-27 Takata Corporation Airbag unit and case of airbag unit
US20060091651A1 (en) * 2004-10-27 2006-05-04 Nihon Plast Co., Ltd. Air bag module
US7823917B2 (en) 2004-10-27 2010-11-02 Nihon Plast Co., Ltd. Air bag module
US20070235987A1 (en) * 2006-04-11 2007-10-11 Brian Boggess Impact Absorbing Airbag Inflator
US20090026739A1 (en) * 2006-04-11 2009-01-29 Honda Motor Co., Ltd. Impact Absorbing Airbag Inflator
US7448642B2 (en) 2006-04-11 2008-11-11 Honda Motor Co., Ltd. Impact absorbing airbag inflator
US7641221B2 (en) 2006-04-11 2010-01-05 Honda Motor Co., Ltd. Impact absorbing airbag inflator
US20100066063A1 (en) * 2006-04-11 2010-03-18 Honda Motor Co., Ltd. Impact Absorbing Airbag Inflator
WO2007121221A3 (en) * 2006-04-11 2008-01-17 Honda Motor Co Ltd Impact absorbing airbag inflator
US8033566B2 (en) 2006-04-11 2011-10-11 Honda Motor Company Impact absorbing airbag inflator

Also Published As

Publication number Publication date Type
GB2271532A (en) 1994-04-20 application
GB9320406D0 (en) 1993-11-24 application
GB2271532B (en) 1996-05-01 grant
JPH06127324A (en) 1994-05-10 application
DE4335073B4 (en) 2011-06-09 grant
DE4335073A1 (en) 1994-04-21 application
US5431439A (en) 1995-07-11 grant
JP3161086B2 (en) 2001-04-25 grant

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AS Assignment

Owner name: TAKATA CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AMAMORI, ICHIRO;KOKEGUCHI, AKIRA;REEL/FRAME:006730/0729

Effective date: 19930830

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